Tiltable table band saw machine



Dec, 25, 19 51 QRESCAN 2,579,955

TILTABLE TABLE BAND SAW MACHINE Filed Dec. 16, 1947 4 Sheets-Sheet 1Michael Orescan INVENTOR De c. '25, 195]" Y M QRESCAN 1 v 2,579,955 4TILTABLE TABLE BAND SAW MACHINE Filed Dec. 16; 1947 4 Sheets-Sheet 2Michael Orescan INVENTOR.

By /WM -M L iatented Dec. 25, 1 951 UNITED STATES TNT OF C 3 Claims.(01. 143-.17)

This invention relates to band saw machines and more particularly to aband saw machine of the type having an upright hollow frame with a frontgap, a tiltable table, and an endless flexible band saw operativelymounted in the frame to traverse said gap, with novel means for drivingsaid flexible band saw and for adjusting the same, together withimprovements and refinements in the structure and mounting of a workreceiving table and sawdust disposal means.

The primary object of this invention is-the provision of a sawingmachine which will accommodate a wide variety of work without undulystraining or damaging the saw.

Another salient object is to provide means for simple and accurateadjustmentof thelsaw in two directions relative to the frame, as well asto tension the saw.

Still another object of this invention is to provide a saw machine inwhich a change or replacement of the saw can be expeditiouslyaccomplished and in which the table can be adjusted to receive differenttypes of work andiat differentangles while providing a deep gap and adeep flat table when in horizontal position.

Yet another object is to provide improved drive means for a band sawcapable of handling heavy work without slippage and jamming of the bandsaw. 4 7

And a last object to be specifically mentioned is to provide aconstruction which is relatively inexpensive and entirely practicable tomanufacture, simple and convenient as well as safe to use, and whichwill give generally efiicient and M durable service.

With these objects, as well as other inherent and specific objects whichwill become evident as this description proceeds, this invention residesin certain novel improvements and refine,- ments in construction,combination and arrangement of parts and portions as will be describedin the specification, particularly pointed out in the appended claims,and illustrated in the accompanying drawings which form a material partv r v 2 Figure 7 (Sheet 2) isan enlarged fragmentary horizontalsectional view, taken on the line 1-1 in Figure 1;

Figure 8 is an enlarged fragmentary view showing, in perspective, thepivotal attachment of the table; and

Figure 9 is a fragmentary vertical sectional view of the base of theframe with the portion of the drive means enclosed by said base shown inelevation, this construction being a modification of the simplerstructure illustrated in some of the other figures.

Similar characters of reference relate to similar or identical parts andportions throughout the specification and throughout the several viewsof the drawings.

Referring now to the drawings, the frame of the machine is hollow andcomprised of a head I0, back l2 and base 14 which is secured as to afloor or Work bench, by attachment brackets [6 with attaching studs [8.A gap 20 is provided at the front of the machine between the head, backand base l4. Access to theinterior of the frame is had througha doorhinged to and forming one. side of therframe and held closed by a hasp24 and thumbscrew 26.

Work is supported on a table comprised of the front section 28 and rearsection 30 hinged thereto, as at 32, the front section being pivoted tothe frame by integral depending lugs 34 and pin 36 (Fig. 8) threadedlysecured on the frame and a knob 38 and shoulder 40 are provided on thepin 36 so that the table may be locked in position either horizontal orinclined as indicated in dash line in Figure 2. A scale with indiciaindicating the angle of the table, in degrees, relative to thehorizontal portion 42 of the bed, and anindex hand 44 are provided asindicated in Figure 8. The front portion 46 of the bed is inclined andopen as indicated at 48 in Figures 2 and 8. The inclined portion 46 ofthe bed provides rigid support for the front section 28 of the tablewhen inclined at 45 degrees. When the table is inclined considerably, asimple lock bar 50, pivoted to the rear edge portion of the frontsection 28 as at 52, is turned transversely of the table to allow thesections of the table to hinge, this construction allowing theemployment of a deeper table and a deeper gap 26 in the frame.

The table is apertured at 54 to receive the endless flexible band saw 56and this saw is mounted Within the frame in encircling relation on therollers 58 rotatably mounted on semi-circular plate member 60 in thehead and a plurality of similar rollers 62 rigidly mounted on shafts I08journalled in the plate 66 in the base I4 of the machine.

Referring to the structure in the head It), the plate 69 is supported bythe spaced bars 68, terminally fixed thereto, as at ID in Figure '7, andextending laterally through vertical slots I2 in the side of the headIll, these bars being threaded and having thumb nuts I4 with annularflanges 16 associated with pairs of brackets I8 secured to the side ofthe head II], as by screws '80, on each side of each slot I2.

Ordinarily, the flanges I8 will bear against the side of the head It anda pair of set studs 82, threadedly mounted in the plate 68, aretightened against the inside of the head I0, as best indicated in Figure3, and are used to hold the plate 60 rigidly as against movementtransversely of the machine. through a lug 89 on one side of the plate69 and extending through the plate 88 forming the top of the gap in theframe. is used to raise and lower theplate 6B, the bolt 84 havingcollars 90 rigid on the bolt and engaging the plate 88 and this boltterminates at its lower end in a knurled knob 92. a

The rollers 53, as well as the rollers 62, are covered with resilientmaterial such as rubber to minimize slippage of the saw 56. The bolt 84and coacting structure provides for tightening and loosening. the bandsaw, while the adjustment of the bars 68 and studs 82 provides forleveling of the saw.

. The head I is constructed with a fixed vertical channel member 94immediately within the front side of the head and the shankportion 96 ofthe saw guide assembly is vertically and adjustably mounted in thischannel 94 and held in adjusted position by the thumbscrew 98. The lowerend of the shank 96 may be offset as at I00 and a shaft I02 isthreadedly associated with. this offset portion I00, the outer end ofthe shaft having a fixed knob I04 to facilitate turning of the shafthaving a grooved-roller IE6 freely rotatably mounted thereon, the groovein the roller receiving the back edge of the saw 56 to steady and guidethe same. a

As will be understood from the foregoing description,- the rubber tiredrollers 62 aredriving rollers fixed to the shafts I08 which extendthrough the fixed side of the base I4 for rigid connection to pulleysIII). The shafts mayhave integral shoulders H2 and. collars H4 and, asbefore stated, the fixed plate 65 with bearings therein is provided tosupport these shafts H2. The main drive shaft H6 is similarly supportedand is of greater length to carrya saw engaging pulley II'I on theinside of the base and four pulleys outside the base, the center pulleysII8 driving belts I20 entrained around the pulleys IIO on either side,of the shaft H6, and the outside pulley I22 having a belt I24 entrainedthereon leading from a source of power such as the electric motor I26.

The inside pulley I28 drives a belt I30 entrained on a pulley I32carried on a shaft I34 which is fixed to the fan I39 on the inside ofthe base I4. This fan rotates Within a chute I38 supported by bracketsI39 and designed to direct air motivated by the fan from the aperture 48and to expel this air, laden with sawdust, into a suitable receiver, notshown, connected to the portion I49 of the chute extending outside thebase I4.

An adjustment bolt 84 threaded 1 Refinements such as the band guard I42(Fig. 1) secured to the shank 96, and belt tightened pulleys I44 carriedon arms I46 (Fig. 5) pivoted on the side of the base I4 and adjusted bythumbscrews I48 threaded in lugs I58, may be added, and the modifiedform of drive means for the saw illustrated in Figure 9 is especiallynoteworthy. This modification is adapted particularly for driving bandsaws in large machines and where large work is to be handled. An endlessbelt I52 is interposed between the drive rollers and the saw, the Figure9 illustrating rollers I54 of gear type and the belt I52 is providedwith teeth I-56,-the teeth of the gears and belt being substantiallyco-extensive with the Width of the belt.

The operation of this invention will be clearly understoodfrom aconsideration of the foregoing description of the mechanical detailsthereof taken in connection with the above recitation of the objects ofthis invention and it will be clear that all of these objects are amplyattained. I Minor variations may be made in the details of constructionand proportionment of the various elements of this invention withoutdeparture from the spirit and scope thereof which should be limited onlyby a proper interpretation of the terms used in the appended claims.

Having described the invention whatis claimed as new is: a

l. A band saw comprising an upright frame having a base and a front gapabove said base, aband saw operatively mounted on said frame so as totraverse the front of said gap, the frame just below said gap having adownwardly inclined portion at the front thereof, an aperture in saidportion to receive the saw, a blower operatively mounted in said baseand arranged to draw air through said aperture, and a work table:mounted for pivotal movement about an axis adjacent said aperture sothat the work table can be pivoted into engagement with said downwardlyinclined portion, said Work tablebeing sectional and hinged on a lineparallel with said axis and within said gap, whereby a portion of theWork table can extend into said gap substantially the full depth of thegap when the Work table is horizontal, and providing for pivotalmovement of a section of said portion of the work table when the rest ofthe Work table is pivoted to a tilted position. 7,

2. A band saw comprising a frame having a front gap. a band sawoperatively mounted on said frame so as to traverse the front of saidgap, a tiltable work table having a saw aperture, the frame just belowthe front of said gap having a downwardly inclined portion at the. frontthereof to support the table in an extreme tilted position, said tablebeing sectional and hinged on a line transverse to said frame and withinsaid gap, said inclined portion of the frame having an opening, and asuction fan operatively connected with said opening.

v 3. A band saw comprising an upright hollow frame having a front gap, aband saw operatively mounted in said frame so as to traverse the frontof said gap, the frame just below the gap having a downwardly inclinedportion at the front thereof, said inclined portion being provided witha saw aperture, a. blower mounted in said frame and adapted to draw airthrough said aperture, and "a work table mounted on said frame forpivotal movement about an axis adjacent said aperture whereby the tablemay be swung'into supporting engagement by said downwardly inclinedportion.

MICHAEL ORESCAN.

REFERENCES CITED 5 The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 10 104,770 Richards et a1 June28, 1870 144,797 Roche et a1 Nov. 18, 1873 337,630 Shavalier et a1 Mar.9, 1886 383,458 Gowen May 29, 1888 351,672 Vail Oct. 26, 1888 15 NumberNumber Name Date Rodgers May 27, 1890 Lounsberry Apr. 16, 1895 ManeringJan. 21, 1902 Thomson June 3, 1924 Ponton Dec. '7', 1937 Hedgpeth Mar.3, 1942 Boice et a1 May 2, 1944 FOREIGN PATENTS Country Date GreatBritain Dec. 11, 1876 Germany Oct. 18, 1920 Denmark June 21, 1926

